Money Lesson

What Is Interest?

4 min read

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Interest is the cost of borrowing money or the money a financial institution may pay for keeping savings with it. The direction depends on the arrangement. If you save in an interest-paying account, you may earn interest. If you borrow, you may have to pay interest on top of the amount borrowed.

Interest on savings

Imagine an account pays interest on the money you keep in it. The amount earned depends on the balance, rate, time and account rules. Actual rates and calculations vary, so a simple example is only a learning tool.

Explain that not every account pays the same rate, and fees or conditions may affect the result. Read the terms rather than choosing an account based only on a headline rate.

Interest on borrowing

When money is borrowed, interest is often charged for the use of that money. A loan may also include fees and repayment conditions. The total cost can be more than the amount first received.

Teach children to ask three questions: How much must be repaid? By when? What happens if a payment is missed? These questions help make borrowing obligations visible.

Rates and time matter

A higher rate can mean more interest earned on savings, but it can also mean a more expensive loan. The way interest is calculated and how often it is added can change the result.

Avoid assuming that interest always makes money grow safely. Inflation can reduce what money buys, and borrowing costs can build up if repayments are missed.

Growing money confidence, one step at a time

Children build financial understanding through repeated, age-appropriate practice. Keep the conversation calm, adapt examples to your family and treat mistakes as opportunities to learn.

At CubVest, we connect five money skills: Earn, Save, Spend, Give and Invest. You do not need to teach them all at once. Begin with one useful decision and build from there.

© 2026 AdGawk (Pty) Ltd. All rights reserved. This article is original CubVest educational content. Reproduction or republication without permission is prohibited, except as permitted by law.

CubVest provides financial education to help families develop healthy money habits. This article is educational and does not constitute personalised financial advice.

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